package thinkingJava.chapter13;

public class Immutable {
	public static String upCase(String s) {
		return s.toUpperCase();
	}
	public static void main(String[] args) {
		String s = "holywow";
		print(s);
		String us = upCase(s);
		print(us);
		print(s);

	}
	public static void print(Object o) {
		System.out.println(o);
	}
}
